<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
     <!-- 引入vue -->
     <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
   
    <div id="root">
        <h2>今天天气很{{info}}</h2>
        <!-- 在绑定事件的时候：@xxx = "yyy" ,yyy可以写一些简单的语句 -->
        <!-- <button @click="isHot = !isHot">切换天气</button> -->
        <button @click="changeWeather">切换天气</button>
    </div>
    
</body>
<script type="text/javascript">
    Vue.config.productionTip = false //阻止vue在启动生成生产提示。

    new Vue({
        el:'#root',
        data:{
            isHot:true
        },
        computed:{
            info(){
                return this.isHot? "炎热" : "凉爽"
            }
        },
        methods:{
            changeWeather(){
                this.isHot = !this.isHot
            }
        }
       
    })
    </script>
</html>